Which of the following compounds can be best prepared by Wurtz-reaction ?

(1) Iso-butane

(2) n-butane

(3) n-pentane

(4) Iso-pentane

1. 3             
2. 4             
3. 1            
4. 2 

Product (P) in the above-mentioned reaction is:-  

1.		2.
3.		4.	Both (2) & (3)

Determine the double bond equivalent (degree of unsaturation) of the compound 'A':  

(A) $\stackrel{{\mathrm{H}}_2\left(1\mathrm{mole}\right)/\mathrm{Pt}}{\to }$

Given that compound 'A' undergoes hydrogenation with 1 mole of H₂ in the presence of Pt, yielding the depicted product, what is the double bond equivalent of 'A'?
 

1.  1                 

2. 2               

3. 3                 

4. 4

Ethane is subjected to combustion process. During the combustion the hybrid state of carbon changes from:-

(1) sp² to sp³

(2) sp³ to sp

(3) sp to sp³

(4) sp² to sp²

The above reaction is an example of:-

1. isomerization

2. polymerization

3. cracking

4. de-hydrogenation

(I)  

(II)  

(II)  
Arrange the compounds I, II and III in decreasing order of their heats of combustion:-
(a) II>I>III
(b) I>II>III
(c) III>II>I
(d) III>I>II

(I)  

(II) 

(III)  

The correct order of reactivity of I,II and III towards addition reactions is:

(1) I>III>II                 

(2) I>II>III             

(3) III>II>I               

(4) III>I>II

Which of the following reactants is suitable for the preparation of methane and ethane by using one-step only?

1.  H₂C = CH₂

2. CH₃OH

3. CH₃-Br

4. CH₃-CH₂-OH